Dell Brocade 6520 Administrator's Guide Supporting Fabric OS 7.1.0 - Page 159

Remote authentication 5 If CHAP authentication is required, then Windows must be configured to store passwords with reversible encryption. Reverse password encryption is not the default behavior; it must be enabled. NOTE If a user is configured prior to enabling reverse password encryption, then the user's password is stored and cannot utilize CHAP. To use CHAP, the password must be reentered after encryption is enabled. If the password is not re-entered, then CHAP authentication will not work and the user will be unable to authenticate from the switch. Alternatives to using CHAP are Password Authentication Protocol (PAP), or PEAP-MSCHAPv2. 3. Configuring a user IAS is the Microsoft implementation of a RADIUS server and proxy. IAS uses the Windows native user database to verify user login credentials; it does not list specific users, but instead lists user groups. Each user group should be associated with a specific switch role. For example, you should configure a user group for root, admin, factory, switchAdmin, and user, and then add any users whose logins you want to associate to the appropriate group. 4. Configuring the server For more information and instructions on configuring the server, refer to the Microsoft website. Below is the information you will need to configure the RADIUS server for a Brocade switch. A client is the device that uses the RADIUS server; in this case, it is the switch. a. For the Add RADIUS Client window, provide the following: Client address (IP or DNS) - Enter the IP address of the switch. Client-Vendor - Select RADIUS Standard. Shared secret - Provide a password. Shared secret is a password used between the client device and server to prevent IP address spoofing by unwanted clients. Keep your shared secret password in a safe place. You will need to enter this password in the switch configuration. After clicking Finish, add a new client for all switches on which RADIUS authentication will be used. b. In the Internet Authentication Service window, right-click the Remote Access Policies folder, and then select New Remote Access Policy from the pop-up window. A remote access policy must be created for each group of Brocade login permissions (root, admin, factory, switchAdmin, and user) for which you want to use RADIUS. Apply this policy to the user groups that you already created. c. In the Vendor-Specific Attribute Information window, enter the vendor code value 1588. Click the Yes. It conforms radio button, and then click Configure Attribute. d. In the Configure VSA (RFC compliant) window, enter the following values, and then click OK. Vendor-assigned attribute number - Enter the value 1. Attribute format - Enter String. Attribute value - Enter the login role (root, admin, switchAdmin, user, and so on) that the user group must use to log in to the switch. Fabric OS Administrator's Guide 159 53-1002745-02